Investigation of Porous Structures for Protection of Pipelines against Water Hammer بهکارگيري ساختارهاي متخلخل براي حفاظت خط لوله در مقابل ضربه قوچ
Journal Title: آب و فاضلاب - Year 2018, Vol 29, Issue 5
Abstract
Abstract This study was initiated to investigate the use of a porous structure in some parts of a pipeline to protect it against water hammer pressure wave. This study was inspired by the utilization of porous breakwaters which are commonly used to protect coastal areas. To fulfill the main objective of the study, different porous structures were installed in an experimental pipeline fed by a pump. The water hammer was induced by an upstream valve. The homogeneous porous structures were made up of spherical beads or broken rocks in different sizes and filled them in pipes with different lengths and subject them under different water hammer conditions. Results obtained from this study showed that during the first cycle of water hammer wave, the ratio of maximum pressure downstream of porous structure to the corresponding value in upstream is between 0.6 to 0.95, respectively. This pressure difference decreased drastically in next cycles. Generally, it can be conclude that an insignificant protection gained from a porous structure in downstream from water hammer; however, the overall pressure fluctuations in the pipe filled with a porous structure was less than a fully open pipe under the same discharge rates and the same water hammer condition. The results showed that porous structures in particular condition could be used to control pressure oscillations in piplines and it is proposed to consider practical aspects of this idea in future researches.
Authors and Affiliations
pouria Asiaban, Manouchehr Fathi Moghadam
پيامد هوموسي شدن کاه گندم و توانايي ريزجانداران آن بر جذب زيستي سرب از يک آب آلوده
Adsorption of Pb(II) from Aqueous Solutions on Wheat Straw: Effects of Humification and Sterilization Abstract Biosorption is one of the methods used for the separation of heavy metals from aquatic environments. The ob...
ارزيابي فرايند اکسيداسيون پيشرفته، فنتون هتروژن با نانوکامپوزيت مگنتيت سنتز شده Fe3O4/MWCNTs براي حذف آنتيبيوتيک سيپروفلوکساسين از پسابهاي صنعتي
Evaluation of Synthesized Fe3O4/MWCNTs Nanocomposite Used in the Heterogeneous Fenton Process for the Removal of Ciprofloxacin Antibiotic Ciprofloxacin is an antibiotic vastly administrered for the treatment of infection...
Evaluation of Urban Water Distribution Network Under the Combined Hydraulic and Mechanical Reliabilities برآورد عملکرد شبکه توزيع آب شهري با تلفيق قابليت اعتماد هيدروليکي و مکانيکي
Abstract Network reliability is one of the most important parameter when evaluating the efficiency of water distribution networks (WDNs). WDN reliability is calculated based on the mechanical, hydraulic and water qualit...
حذف فتوکاتالیستی ارتوکلروفنل از محلولهای آبی با استفاده از مخلوط خاکستر فرار اصلاح شده - دی اکسید تیتانیم
The Photocatalytic Removal of Ortho Chlorophenol from Aqueous Solution Using Modified Fly Ash - Titanium Dioxide Abstract The photocatalytic process is a useful method for the effective removal of phenolic compounds....
پالایش آبهای زیرزمینی آلوده به کادمیم با استفاده از نانوذرات آهن در مقیاس آزمایشهای پیمانهای و محیط متخلخل
Remediation of Groundwater Contaminated with Cadmium by Nano-Zero Valence Iron (at Batch and Pore Media Scales) Abstract Since a major portion of the food we use is provided by corps irrigated with water that is suppl...